Dimensions: 3.3" L x 2.1" W x 0.3" H.Weight: 1.0 oz (with batteries).
Durable, rugged case ensures maximum longevity under extreme conditions.
Will not interfere with other technologies.
Participants receive answer confirmation on their ResponseCard through two-way communication. Successful transmissions are acknowledged on the participant's keypad via a three second long visual green light signal.
